The trend shown in this chart can be traced back to an invention by
a. Michael Faraday.
b. Henry Ford.
c. Henry Bessemer.
d. James Watt.
![The trend shown in this chart can be traced back to an invention bya Michael Faradayb Henry Fordc Henry Bessemerd James Watt class=](https://us-static.z-dn.net/files/de9/d2be45b0f29a3914e31aa619823c1e36.png)